Dumb-waiter



(No Model.)

F. PRIEDGEN.

DUMB WAITER. No. 336,046 Patented Feb. 9, 1886.

WITNESSES: INVENTEIR:

OP'MM Jam 7 N. PETERS Fhowumu n nnn Washington. D. cv

UNITED STATES PATENT OFFICE.

FREDRICK FRIEDGEN, OF PHILADELPHIA, PENNSYLVANIA.

DUMB-WAITER.

SPECIFICATION forming part of Letters Patent No. 336,046, dated February9, 1886.

Application filed December 24, 1885. Serial X0. 186,650.

To (tZZ whom it may concern:

Be it known that I, FREDRICK FRIEDGEN, of the city and county ofPhiladelphia, in the State of Pennsylvania, have invented certain newand useful Improvements in Dumbaiters, of which improvements thefollowing is a specification.

My invention relates, generally, to elevating apparatus of the classknown as dumb-waiters, capable of being operated by handpower andsusceptible of use in dwellings and other places for raising andlowering comparatively light weights; and it consists of certain novelfeatures in the construction and arrangement of a car provided withcurved guideplates rigidly attached to the sides thereof, and fittingaround a portion of the cylindrical surfaces of two tubes secured withinthe main casing, preferably made of scamless brass, and in which one ofthese tubes is used for the purpose of allowing of the free movementthcrethrough of a counter-weight, holding the car firmly while loadingor unloading, and each end thereof attached to an endless rope or cablesecured to the top and bottom of the car, and passing over pulleys heldin suitable bearings within the main cas ing at the top and bottom ofthe structure, while the other tube is utilized for performing thefunction of an ordinary speaking-tube, by which combined arrangement aneat and compact dumb-waiter is obtained, and one which may be operatedwith an expenditure of comparatively little power in comparison withthat heretofore required for such apparatus, the construction,arrangement, and operation of which apparatus will be hereinafter moreparticularly described, and pointed out in the claim.

In the accompanying drawings, illustrating my invention, Figure 1 is afront elevation, partly in section, of my improvements. Fig. 2 is a sideelevation of the same. Fig. 3 is a top view of the car, showing thebrass tubes serving to guide the car in its movement upward anddownward, and one of them for allowing the counter-weight to travel in,and the other for use as a speaking-tube; and Fig. 4 is a side elevationof the car on an enlarged scale, showing sections of the tubes.

Parts appearing in more than one figure are (No model.)

represented by the same reference-letters in all of them.

Referring to the drawings, A'represents the main case or frame-workinclosing the operative parts and mechanism of the apparatus. This caseA extends upward through as many stories of a building as may berequired, and is provided with suitable doors, B-such as shown, forexample, in Fig. lto permit of access being had to the car for loadingor unloading the same. Rigidly secured in any suitable manner to theinterior sides of the main casing A are two cylindrical tubes, D and D,preferably made of seamless brass metal, extending the entire length ofthe structure, and of such size as may be required.

E is a single-groove pulley secured in suitable bearings, 6, within themain case A, at the top thereof, and E is a single'groove pulley securedin a similar manner in bearings e in the lower part of said main case A.

G is a car, of any suitablelight construction, and having therein avarying number of shelves, 0, upon which are trays 0, provided with lugs0', cast upon their bottoms and fitting into recesses 0 formed in theshelves 0, which firmly hold the trays c in position. These 5 trays areprovided with perforated false bottoms (1, allowing liquids contained inglasses or other receptacles spilling while being ele vated to drainthrough these perforated plates (1 into the bottom of the trays, andthus permitting of the easy removal of the trays without in the leastdamaging whatever may be upon the remaining shelves of the car 0. Uponthe exterior sides of the car, preferably at the four corners thereof,are secured curved guides G, loosely fitting around a portion of thecylindrical surface of the seamless brass tubes D and D, and, whileholding the car in position, permitting of its free movement upward anddownward between these tubes.

Rigidly attached to the outside of the car C, at the top and bottom,near or in the center thereof, are eyes f and f, to which the endlessrope or cable F is secured, passing over the pulley E in the upperinterior part of the main frame A to the counter-weight H, provided witheyes h and h in each end thereof, for the attachment thereto of thisendless rope or cable F, and which counter-weight Htravcls freely upwardand downward within the tube D as the car 0 is raised and lowered byhand-power from the respective floors I and 1. To the interior of themain casting A, a short distance below the pulley E, is provided a stop,6, which prevents the counterweight H from coming in contact with saidpulley, or the endless rope or cable from becoming disengaged.

The tube D is provided with suitable mouthpieces, 9, at convenientdistances apart on the respective floors, for use as a speakingtube, andwhich will be so well understood by reference to Fig. 1 as not to demandany further description thereof.

The operation of my improved apparatus may be explained in the followingmanner:

The car 0, in the position shown in Fig. 1, being required upon thesecond floor,1, by

opening the door B the car may'be readily elevated by hand-power throughthe moveor cable F to be drawn upward from below over the pulley E, andthereby elevating the car to the position desired. 7

This entire structure, as is well understood,

will be generally built within vthe walls of 0 dwellings or otherplaces, and the only part exposed to view would be the doors openinginto the same from the respective floors; or, if so desired, it may bebuilt in anypart of a building, and the casing (surrounding the partsand mechanism for the operation of the same) suitably ornamented.

Having thus described the nature and ob jects of my invention, What Iclaim as new, and desire to secure by Letters Patent, is

As an improvement in dumb-waiters, a car, substantially such asdescribed, provided with curved guides fitting partially around thecylindrical surfaces of two tubes secured within the main casing,through one of which tubes the counter-weight attached at its respectiwe ends to an endless rope or cable passing over pulleys travels, whilethe other is used asa speaking-tube, substantially as and for thepurposes set forth.

In testimony that I claim the foregoing as my invention I have hereuntoset my signature in the presence of two subscribing witnesses.

FREDRIGK FRIEDGEN.

